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Related Affiliates - Additional Information (Details)	3 Months Ended		9 Months Ended
Related Affiliates - Additional Information (Details)	Sep. 30, 2019 USD ($) a	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) a	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Related affiliates
Area of real property leased \| a	20		20
REI
Related affiliates
Percentage of outstanding shares owned	14.40%		14.40%
Gary Carano Family
Related affiliates
Related party transactions	$ 0	$ 0	$ 0	$ 0
C. S. & Y. Associates
Related affiliates
Area of real property leased \| a	30,000		30,000
Lease expiration date			Jun. 30, 2057
Annual rent payable			$ 600,000
Due to related parties	$ 0		0		$ 0
Due from related parties	$ 0		$ 0		$ 0